4130 Steel Bar Stock Alloy Bar

TW’s cold drawn seamless 4130 alloy steel bar, rod, and wire is a lighter weight, higher strength alternative to carbon steel. As the market leader in 4130 alloy steel, TW Metals delivers a full range of 4130 round bar.

Applications

  • Aerospace
  • Motorsports - chassis

Advantages

  • Excellent weldability
  • High yield strength
  • High ultimate tensile strength
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Thickness
Temper
OD
Shape
Diameter

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SKU Description DFARS Manufacture Method Diameter Shape Specification
Sku: A3212 Description: 4130 MIL-S-6758 COND D4 .437 DIA DFARS: Yes Manufacture Method: Air Melt Diameter: 0.4375 Shape: ROD/BAR ROUND Specification: AMS-S-6758
Sku: A3223 Description: 4130 MIL-S-6758 COND D4 1.313 DIA DFARS: No Manufacture Method: Air Melt Diameter: 1.3125 Shape: ROD/BAR ROUND Specification: AMS-S-6758
Sku: A3214 Description: 4130 MIL-S-6758 COND D4 .562 DIA DFARS: No Manufacture Method: Air Melt Diameter: 0.5625 Shape: ROD/BAR ROUND Specification: AMS-S-6758
Sku: 29356 Description: 4130 MIL-S-6758 COND D4 1.250 DIA DFARS: No Manufacture Method: Air Melt Diameter: 1.2500 Shape: ROD/BAR ROUND Specification: AMS-S-6758
Sku: A3222 Description: 4130 MIL-S-6758 COND D4 1.25 DIA DFARS: No Manufacture Method: Air Melt Diameter: 1.2500 Shape: ROD/BAR ROUND Specification: AMS-S-6758
Sku: 75389 Description: 4130 D4 MILS 6758 1.250 X 2.000 DFARS: No Manufacture Method: Air Melt Diameter: 1.2500 Shape: BAR RECTANGULAR Specification: AMS-S-6758
Sku: 28431 Description: 4130 CD ANN C4 AMS-S-6758 1.25X4.00 DFARS: No Manufacture Method: Air Melt Diameter: 1.2500 Shape: BAR RECTANGULAR Specification: AMS-S-6758
Sku: 29353 Description: 4130 MIL-S-6758 COND D4 1.000 DIA DFARS: No Manufacture Method: Air Melt Diameter: 1.0000 Shape: ROD/BAR ROUND Specification: AMS-S-6758
Sku: A3220 Description: 4130 MIL-S-6758 COND D4 1.00 DIA DFARS: No Manufacture Method: Air Melt Diameter: 1.0000 Shape: ROD/BAR ROUND Specification: AMS-S-6758
Sku: 86574 Description: 4130 D4 MILS 6758 1.000 X 1.500 DFARS: No Manufacture Method: Air Melt Diameter: 1.0000 Shape: BAR RECTANGULAR Specification: AMS-S-6758

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Typical Chemical Properties

4130 Annealed Steel Bar, Rod & Wire

Minimum Properties

Tensile Strength, psi

81,200

Yield Strength, psi

52,200

Elongation

28.2%

Rockwell Hardness

B82

Chemistry

Iron (Fe)

97.3 - 98.22%

Carbon (C)

0.28 - 0.33%

Chromium (Cr)

0.8 - 1.1%

Manganese (Mn)

0.4 - 0.6%

Molybdenum (Mo)

0.15 - 0.25%

Phosphorus (P)

0.035% max

Sulphur (S)

0.04% max

Silicon (Si)

0.15 - 0.35%